/**
 * Copyright 2009 Emory University
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated  * documentation files (the 
 * "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use, copy, modify,
 * merge, publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so, subject to
 * the following conditions: The above copyright notice and this permission
 * notice shall be included in all copies or substantial portions of the
 * Software. 
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO
 * EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
package com.markgrand.structuredSql.postgresql

import com.markgrand.structuredSql._

/**
 * Class for appending the VARCHAR type to a given StringBuilder. 
 * 
 * @author Mark Grand
 */
class PostgresqlVarchar protected (val length:Int) extends SQLDataTypeAppender {
  if (length<=0){
    throw new IllegalArgumentException("length must be greater than zero.")
  }
  private var appendHelper:(StringBuilder)=>Unit = append1 _

  protected def this() = { this(1); appendHelper = append0 _ }
  
  def append(builder:StringBuilder) {
    appendHelper(builder)
  }
  
  private def append0(builder:StringBuilder) {
    builder.append("VARCHAR")
  }
  
  private def append1(builder:StringBuilder) {
    builder.append("VARCHAR(")
    builder.append(length)
    builder.append(")")
  }
}

object PostgresqlVarchar {
  def apply() = { new PostgresqlVarchar() }
  
  def apply(length: Int) = new PostgresqlVarchar(length)
}